For example, you connect your Windows 10 to a Smart TV or another HDMI monitor.
But in the playback devices, thedefault audio deviceis still set to your setup speakers etc.
The following are the steps to fix this issue after theWindows 10 1803 update.
Connect the HDMI cable from your Windows 10 PC to your Smart TV.2.
Right tap the volume icon and select Sound tweaks.
This will kick off the System setting of Windows 10 options.
On the left hand side, select Sound if not selected by default.5.
Right hand side, we have Output and Input.6.
For the output gear, you select your Smart TV.
(something related to it)7.
In the input equipment section, select your Windows 10 PC.
This should fix your HDMI audio not working on your Smart TV issue.
The same problem can be resolved in anold fashioned way.
Press the Win key and bang out Control Panel.
View by Small icons at the top.
Find the Sound item and double click it.
A pop-up window wil open.5.
On the playback devices tab, snag the output gadget.
(For example, here SANYO TV-1 is the one).
Right-click it and choose the option that says Set as Default gadget.7.
Now restart the computer.
This should solve the issue and your HD audio should be coming out of your Smart TV.
This is a very common solution to your HDMI audio problem not working on your TV.
But still if its not working there are other solutions I gathered from different forums and websites.
https://www.windowstechit.com/4237/windows-10-hdmi-audio-not-working/
Another solution is to check your default gear drivers are up to date or not.
Most of the times, other controller gear drivers may not be update.
Then you should update them using Windows update or some other Driver update software.
Also see to it that the HDMI cable joining your PC to Smart TV uses the same pin plug.
For example, most of the HDMI cable connector use the 19-pin port.
So check whether its the same on the other end also.
Hope this resolves your problem.
If you still have issue, comment in the section below.
I will attempt to help.
